US2958804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam tube and circuit
Assignee: Varian Medical Systems Inc
•
Filing: 1958-05-19
•
Granted: 1960-11-01
•
Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 George M W Badger
- 👤 Donald H Preist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:20
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190511A
Cited
US2355191A
Cited
US2640935A
Cited
US2619611A
Cited
US2709768A
Cited
US2867747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |